Hydraulic jack base



FIG. 1 is a perspective view of a hydraulic jack base casting showing my new design;

FIG. 2 is a close-up perspective view of the hydraulic jack base shown in FIG. 1;

FIG. 3 is a front elevational view thereof, the rear view being the mirror image thereof;

FIG. 4 is a right side elevational view thereof, the left side being the mirror image thereof;

FIG. 5 is a top plan view thereof; and,

FIG. 6 is a bottom plan view thereof.

The broken lines represent environmental structure and form no part of the claimed design. 

I claim the ornamental design for a hydraulic jack base, as shown and described. 